Means for locking folding doors or the like.



PATENTED MAY 2, 1906.

F. BOHNE. MEANS FOR LOOKING FOLDING DOORS OR THE LIKE.

APPLIUATION FILED MAY 18, 1904.

Patented May 2, 1905.

PATENT OFFICE.

FRIEDRICH BOHNE, OF LAUENSTEIN, GERMANY.

IVIEANS FOR LOOKING FOLDING DOORS OR THE LIKE.

SPECIFICATION forming part of Letters Patent No. 788,626, dated May 2,1905.

Application filed May 18, 1904. Serial No. 208,587.

To all whom 1 it may concern.-

Be it known that I, FRIEDRICH Bonnie, cabinet-maker, a subject of theKing of Prussia, Emperor of Germany, and a resident of Lauenstein, inthe Empire of Germany, havcinvented new and useful Means for LockingFolding Doors or the Like, of which the following is a specification.

The present invention relates to improved means for automaticallylocking folding doors and windows in such a manner that the closed sideor wing is secured in its position without the necessity of a push-boltto be actuated by hand, as heretofore.

Further objects of my invention are to simplify and eheapen theconstruction and to render more eflicient, serviceable, and durable inoperation devices of the kind referred to.

With these ends in view the invention consists in the novel combination,arrangement, and adaptation of parts, all as more fully hereinafterdescribed, shown in the accompanying drawings, and then specifically setout in the appended claim.

In the drawings, Figure 1 shows a front elevation of a folding door,partly in section, to illustrate the interior mechanism of the lookingappliance. Fig. 2 is a vertical section on line A B of Fig. 1. Fig. 3 isa vertical section on line C I) of Fig. 1.

The two sides or wings of the door or window are turnable in hinges ofthe frame a, as usual. Said frame a shows in a recess at the meetingpoints of the two wings a bolt 0, pivoted around a horizontal pin 5.This bolt 0, in the shape of a two-armed lever, is pressed downwardly bymeans of a spring (Z, so that the two bolt-heads cf project into thepath of the two sides or wings of the door or window. Both bolt-headsare rounded or tapered, as shown in Figs. 2 and 3. The bigger head 0serves for locking the left-hand side or wing in its closed positionwhen the right-hand side or wing'is opened. Pulling on the left-handwing causes the bolt-head c to be pressed backwardly, whereupon thiswing can also be opened. The left-hand wing shows on the upper surfaceof its top transverse bar a recess surrounded by a metal plate g for there ception of the bolt-head e. In order to lock both sides or wings inthe frame a when closlng them, so that they are insured againstrattling, the right-hand side or wing when swung home presses with ametal plate It on the upper surface of its top transverse bar againstthe smaller bolt-head f, thereby turning the bolt 0 around its fulcrumb, so that the bolt-head c is further pushed into the lefthand wing. Theaperture of the plate 5 being chosen of a size to firmly hold thebolthead 0 when fully depressed, rattling of the door or window will becompletely obviated.

The herein before described locking arrangement can be adapted to doorsand windows of various dimensions.

I am aware that previous to my applica tion lever-catches for doubledoors were employed. In consequence I do not extend my claim to alever-catch per se, but to the combination of a beveled or tapered headat each end of the lever, said heads, of different size, projecting intothe path of the two doors or wings and the smaller head adapted to wedgethe larger head into the metal-lined recess on top of the respectivedoor or wing when the second door or wing is being closed.

What I do claim as my invention, and desire to secure by Letters Patent,is

Improved means for automatically locking folding doors and windows,comprising a spring-influenced bolt 0 in the shape of a twoarmed leverrotatable around a horizontal pivot Z), a head at each end of the bolt 0projecting into the path of the two sides or wings of the door orwindow, both heads a, f being tapered to allow the closing and openingof the doors by pushing and pulling; a metallined recess in the uppersurface of the top transverse bar of one of the wings for the receptionof the larger bolt-head e, and a metal plate It on the upper surface ofthe top trans verse bar of the second wing, said metal plate it adaptedto press back the second bolt-head f and to firmly wedge the bolt-head cin its metal-lined recess, substantially as described and shown and forthe purpose set forth'.

In witness whereof I have hereunto signed my name, this 28th day ofApril, 1904, in the presence of two subscribing witnesses.

FRIEDRICH BOHNE.

Witnesses:

II. lIALL I'IALL, Lnonoan REISCH,

